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LOCATION.-- Lat 41°49'33", long 87°54'02" (NAD of 1927), in NE1/4SE1/4 sec.31, T.39 N., R.12 E., Cook County, Hydrologic Unit 07120004, on left pier at upstream side of bridge on Wolf Road, in Cook County Forest Preserve, 0.5 mi north of Western Springs, and at mile 8.8. |
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DRAINAGE AREA.-- 115 mi2. |
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PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE |
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DISCHARGE: October 1945 to current year. |
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STAGE: Water years 1994 to current year. |
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SURFACE-WATER QUALITY |
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CHEMICAL: Water years 1978-91 and 1999 to current year. |
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MISCELLANEOUS: Contaminants in streambed sediments, August 1998; contaminants in fish tissue, August 1998. |
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BIOLOGICAL |
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ALGAE: Water years 1989, 1990, and 2002-03. |
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BENTHIC MACROINVERTEBRATES: Water years 1999 and 2002. |
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FISH: Water years 1999-2000 and 2002-04. |
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HABITAT: Water years 1999 and 2002-04. |
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REVISED RECORDS.-- WSP 1915: Drainage area. WRD IL-87-2: Drainage area. WRD IL-97-2: July 21 - Sept. 26, 1996. |
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GAGE.-- Water-stage recorder, phone telemeter, and crest-stage gage. Datum of gage is 624.93 ft above NGVD of 1929. Prior to July 26, 1946, nonrecording gage at same site and datum. |
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REMARKS.-- Occasional regulation by sewage treatment plants upstream from station. Since May 28, 1996, some flow temporarily diverted for flood control to Elmhurst Quarry Flood Control Reservoir 12.3 miles upstream from gage. |
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EXTREMES FOR PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 3,540 ft3/s, Aug. 17, 1987, gage height, 10.54 ft; minimum, no flow, May 27, 1998, due to bridge construction. |
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REMARKS FOR CURRENT YEAR.-- Physical and geomorphic habitat data were collected as part of the National Water-Quality Assessment (NAWQA) program in the upper Illinois River Basin. The data were collected according to Fitzpatrick and others, 1998. Reach A begins 187 ft. upstream from a Cook County Forest Preserve trail bridge, and continues upstream for 984 ft. |
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The following links list up to five tab-delimited text files containing habitat data collected at this site. An explanation of column headers in these files can be accessed at this link.
Reach -- General description of the sampled reach.
Geomorphic Channel Unit (GCU) -- Fluvial geomorphic descriptors of channel shape and stream velocity (for example pool, riffle, or run).
Transect -- Channel and bank measurements made along transects (cross sections) within each reach.
Channel features -- Measurements of bars, shelves, and islands at each transect (cross section).
Transect Points -- Channel and substrate measurements and observations at points along a transect (cross section).
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Table of Contents |
Introduction |
Station Descriptions |
Surface-Water Data |
Ground-Water Data |
Meteorological Data |
Biological Data |